If the radius of a circle is doubled, its area becomes:
If \(\alpha\) and \(\beta\) are the roots of \(x^2-5x+6=0\), the value of \(\alpha^2+\beta^2\) is:
The value of \(\sin^2 30^\circ + \cos^2 30^\circ\) is:
The sum of the first 10 terms of an AP with \(a=2\) and \(d=3\) is: